<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    var score = 85
    if(score >85 && score<=100){
        alert('优秀')
    }
    else if(score>70&&score<=85){
        alert("良好")
    }
    else if(score>=60&&score<=70){
        alert("及格")
    }
    else {
        alert("不及格")
    }
</script>
</body>
</html>